Patents Assigned to Hajima Ishimaru
  • Electrostatic dust collector for use in vacuum system
    Patent number: 4941224
    Abstract: An electrostatic dust collector including a wall enclosing a vacuum chamber in which a target face to be subjected to dust removal is provided, an electron beam emitting device for emitting electron beams to dust on the target face so as to charge the dust negatively, a dielectric member which is provided in the vacuum chamber and has a collecting face confronting the target face and a member for imparting positive potential to the collecting face such that the dust charged negatively is attracted to the collecting face.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: July 17, 1990
    Assignees: Matsushita Electric Industrial Co., Ltd., Hajima Ishimaru
    Inventors: Hiroshi Saeki, Junji Ikeda, Hajime Ishimaru